I didn't stay at a holiday inn express last night, but given the accounts of how quickly he was getting shots off, that sounds like what he did.
If so, that would be one issue with selling them other than "it looks scary ".
Not from what I heard. I would go as far to say it was a standard Semi-auto. That said, he most likely would have killed fewer people with a full auto. I know there are no facts to back up this claim but a spray and pray method has often not proven effective in close quarter situations. Our GI's in WWII knew this all to well with their standard issue M1's. Make every bullet (and reload) count.
If you head full auto's I bet it was from those MP5's the SWAT Teams were toting around.